Slide rail buckle structure capable of preventing outward falling

Abstract

The sliding rail buckle structure comprises an outer rail, a middle rail and an inner rail, the inner rail is arranged in the middle rail in a sliding mode, the middle rail is arranged in the outer rail in a sliding mode, a handle switch assembly is installed on the inner rail, the handle switch assembly comprises a handle, a rivet and a first torsional spring, the handle is hinged to the inner rail through the rivet, and the first torsional spring is arranged on the middle rail. The first torsion spring is sleeved on the rivet, two ends of the first torsion spring are respectively connected with the inner rail and the handle, the handle is connected with a buckling piece, a hook angle is arranged at a buckling point of the buckling piece, the hook angle and a clamping position of the outer rail form attaching type reverse limiting, and the hook angle can effectively prevent the buckling piece from being separated outwards due to the influence of external force or elastic fatigue. Through the cooperation of the continuous elastic acting force of the first torsional spring, the buckle piece and the clamping position are matched more tightly, limiting is more reliable, meanwhile, through the combination of the secondary anti-disengaging arrangement of the lock catch and the limiting plate in the middle rail, double locking of the three-section type structure of the sliding rail is achieved, and the overall anti-disengaging stability is further improved.

Description

Technical Field

[0001] This invention belongs to the field of slide rail technology, specifically relating to a slide rail buckle structure that prevents external detachment. Background Technology

[0002] As a core transmission structure for realizing linear sliding and positioning of components, slide rails are widely used in many fields such as RV storage, car refrigerators, and industrial equipment. Their working stability directly determines the user experience and safety of the whole product. In the assembly and operation of slide rails, the snap-fit ​​structure is a key component for locking and positioning between slide rail segments and preventing relative sliding. It must meet the requirements of ease of assembly, locking reliability, and structural durability after long-term use.

[0003] Existing sliding rail locking structures mostly employ a combination of protrusions and slots for locking. This involves an elastic protrusion on the locking body engaging with the corresponding slot on the sliding rail, relying on elastic force to maintain the locking state. However, this traditional locking structure has significant design flaws. The locking body is often a single protrusion without a specific anti-detachment limiting structure, leading to easy derailment during actual use and severely impacting the reliability of the sliding rail. Specifically, when the sliding rail is subjected to external impact, vibration, or long-term repeated sliding causing elastic fatigue of the locking mechanism, the single protrusion and slot of the traditional locking mechanism are prone to loosening. Furthermore, due to the lack of lateral limiting and anti-detachment constraints on the protrusion, the protrusion can easily detach from the slot, causing slide rail segment separation and positioning failure. Summary of the Invention

[0004] The purpose of this invention is to provide a slide rail buckle structure that prevents external detachment, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a slide rail buckle structure for preventing external detachment, comprising an outer rail, a middle rail, and an inner rail, wherein the inner rail is slidably disposed within the middle rail, the middle rail is slidably disposed within the outer rail, and a handle switch assembly is installed on the inner rail, the handle switch assembly comprising a handle, a rivet, and a first torsion spring, wherein the handle is hinged to the inner rail via the rivet, and the first torsion spring is fitted onto the rivet, with both ends of the first torsion spring respectively connected to the inner rail and the handle;

[0006] The handle is connected to a buckle piece, and the bottom end of the outer rail is provided with a locking position that matches the buckle piece. The hook at one end of the buckle piece can be locked into the locking position under the action of the first torsion spring to prevent the inner rail from coming out.

[0007] The other end of the inner rail is provided with a buckle and a second torsion spring. The second torsion spring is connected to the buckle. The middle rail is provided with a limiting plate. When the inner rail is fully pulled out, the buckle can cooperate with the limiting plate of the middle rail under the action of the second torsion spring to prevent the middle rail from coming off the outer rail.

[0008] Preferably, the end of the outer rail is provided with a plastic buffer plate. The plastic buffer plate is used to buffer the impact between the inner rail and the outer rail when the slide rail is stored. By buffering the impact when the slide rail is stored, noise and structural wear are reduced, and rail deformation or loosening of the buckle is avoided.

[0009] Preferably, rolling elements are provided between the outer rail and the middle rail, and between the middle rail and the inner rail, to reduce the friction force when the slide rail slides. By setting the rolling elements, the sliding friction force between the rails is reduced, the smoothness of the slide rail is improved, friction loss is reduced, and the structural durability is enhanced.

[0010] Preferably, the rolling element includes iron sheet balls and plastic sleeve balls. The iron sheet balls are disposed between the outer rail and the middle rail, and the plastic sleeve balls are disposed between the middle rail and the inner rail. Different balls are arranged in layers. The iron sheet balls improve load-bearing capacity and wear resistance to meet heavy load requirements, while the plastic sleeve balls reduce noise and wear and protect the surface of the rail body.

[0011] Preferably, the outer rail, middle rail and inner rail are each provided with a number of hollow grooves. The hollow grooves enable the slide rail to be lightweight without reducing the structural strength, thus balancing weight reduction, adaptability and structural reliability.

[0012] Preferably, one end of the handle is fitted with a rubber sleeve, which increases the friction between the hand and the handle to prevent slippage, while also improving the feel and comfort of operation.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) By setting a hook at the buckling point of the buckle piece, a fitting reverse limit is formed with the buckling position of the outer rail. The hook can effectively prevent the buckle piece from coming out due to external force or elastic fatigue. Combined with the continuous elastic force of the first torsion spring, the buckle piece and the buckling position are more closely matched and the limit is more reliable, avoiding the problem of separation between the inner rail and the outer rail. At the same time, combined with the secondary anti-detachment setting of the lock and the inner limit plate of the middle rail, the double locking of the three-section structure of the slide rail is realized, further improving the overall anti-detachment stability and adapting to complex usage scenarios such as vibration and impact.

[0015] (2) Iron ball bearings are set between the outer rail and the middle rail to improve the load-bearing capacity and wear resistance, and to meet the sliding requirements of heavy loads; plastic ball bearings are set between the middle rail and the inner rail to reduce sliding noise and avoid hard friction between metals, thus protecting the surface of the rail body; and the hollow groove design of the outer rail, middle rail and inner rail can reduce weight without affecting structural strength, taking into account both lightweight and durability.

[0016] (3) The plastic buffer plate at the end of the outer rail can effectively buffer the impact between the inner rail and the outer rail when the slide rail is stored, reduce collision noise, reduce structural wear, and avoid long-term impact that could cause the rail body to deform or the buckle to loosen. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the middle rail and inner rail after stretching in this invention;

[0019] Figure 3 This is an exploded view of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the present invention after the outer rail has been disassembled.

[0021] In the diagram: 1. Outer rail; 2. Middle rail; 3. Inner rail; 4. Handle; 5. Rivet; 6. First torsion spring; 7. Buckle piece; 8. Locking position; 9. Lock; 10. Second torsion spring; 11. Plastic buffer plate; 12. Iron ball bearing; 13. Plastic sleeve ball bearing; 14. Hollowed-out groove; 15. Rubber sleeve. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0024] This invention provides, for example Figures 1-4The slide rail buckle structure shown includes an outer rail 1, a middle rail 2, and an inner rail 3. The inner rail 3 is slidably disposed within the middle rail 2, and the middle rail 2 is slidably disposed within the outer rail 1. The inner rail 3 is equipped with a handle switch assembly for locking and unlocking operation and adapting to the slide rail telescopic operation. The handle switch assembly includes a handle 4, a rivet 5 for hinged installation and providing rotational support, and a first torsion spring 6 for providing continuous elastic locking driving force. The handle 4 is rotatably hinged to a preset installation position on the inner rail 3 via the rivet 5, realizing the reciprocating rotation of the handle 4 around the rivet 5. The first torsion spring 6 is fitted on the outside of the rivet 5, and the two ends of the first torsion spring 6 are fixedly connected to the inner rail 3 and the handle 4 respectively, for providing a reset elastic force for the handle 4 and maintaining the stability of the locked state.

[0025] The handle 4 is fixedly connected with a buckle piece 7 for locking and limiting the inner rail and the outer rail. The bottom end of the outer rail 1 is provided with a locking position 8 that is adapted to the buckle piece 7 and is used to cooperate with the buckle piece 7 to achieve locking and limiting. One end of the buckle piece 7 is integrally formed with a hook corner for enhancing the anti-outward detachment performance. The hook corner can be locked into the locking position 8 under the elastic driving force of the first torsion spring 6 to form a reverse bite limit, realize the detachable locking of the inner rail 3 and the outer rail 1, and limit the inner rail 3 from falling outward under external force, vibration or long-term sliding action, so as to ensure the positioning reliability of the inner rail during the extension and retraction process.

[0026] The other end of the inner rail 3 is equipped with a latch 9 for preventing the middle rail from slipping outwards and a second torsion spring 10 for providing elastic reset and locking force to the latch 9. The second torsion spring 10 is connected to the latch 9 and is used to drive the latch 9 to achieve telescopic reset. The middle rail 2 is fixedly provided with a limiting plate for cooperating with the latch 9 to achieve the limiting position. When the inner rail 3 is fully pulled out along the middle rail 2 to the limit position, the latch 9 can form a snap-fit ​​with the limiting plate of the middle rail 2 under the elastic driving force of the second torsion spring 10, so as to achieve the relative positioning of the middle rail 2 and the inner rail 3, thereby restricting the middle rail 2 from slipping outwards from the inside of the outer rail 1, constructing a double anti-slip locking structure, and improving the overall running stability of the slide rail.

[0027] The outer rail 1 is fixedly fitted with a plastic buffer plate 11 for buffering protection. When the slide rail is fully retracted, the plastic buffer plate 11 can buffer the impact force between the end of the inner rail 3 and the end of the outer rail 1, reduce collision noise, reduce wear on the rail body and buckle structure, avoid rail deformation or buckle loosening caused by long-term impact, and extend the overall service life of the slide rail.

[0028] Rolling elements are installed between the outer rail 1 and the middle rail 2, and between the middle rail 2 and the inner rail 3, to reduce sliding friction resistance and ensure smooth extension and retraction of the slide rail. The rolling elements can reduce the relative friction loss between the rails, improve the smoothness of the slide rail sliding, and enhance the load-bearing capacity and structural durability of the slide rail, making it suitable for long-term repeated extension and retraction scenarios.

[0029] The rolling element includes iron ball bearings 12 for adapting to heavy loads and improving wear resistance, and plastic ball bearings 13 for noise reduction, wear reduction, and protection of the rail surface. The iron ball bearings 12 are assembled between the outer rail 1 and the middle rail 2 to bear the overall load, reduce sliding friction between the middle rail and the outer rail, and adapt to the sliding requirements of heavier loads. The plastic ball bearings 13 are assembled between the middle rail 2 and the inner rail 3 to avoid direct hard contact between the metal rails, reduce noise generation during sliding, and protect the surface precision of the inner rail 3 and the middle rail 2, thus balancing smooth sliding and noise reduction.

[0030] The outer rail 1, middle rail 2 and inner rail 3 are all provided with a number of hollow grooves 14 for lightweight design. The hollow grooves 14 reduce the overall weight of the slide rail without reducing the structural strength and load-bearing performance of the rail body, optimize the installation compatibility of the slide rail, save material usage, and take into account both lightweight and structural reliability.

[0031] The operating end of the handle 4 is fitted with a rubber sleeve 15 to improve the feel of operation and achieve anti-slip protection. The rubber sleeve 15 can increase the friction between the hand and the handle 4 to avoid slipping during operation, while also cushioning the pressure of the hand and improving the comfort of operation.

[0032] In this anti-detachment slide rail buckle structure, when the slide rail is in the retracted state or the preset locking position, the first torsion spring 6 remains in a naturally relaxed state. Its two ends act on the inner rail 3 and the handle 4 respectively, generating a continuous elastic driving force. This pushes the handle 4 to rotate around the rivet 5 in the forward direction along the hinge point, thereby driving the buckle piece 7, which is fixedly connected to the handle 4, to move synchronously. This allows the buckle piece 7 to accurately engage with the preset locking position 8 at the bottom of the outer rail 1, completing the initial locking. The core anti-detachment function is achieved by a hook-shaped structure set at one end of the buckle piece 7. The hook-shaped structure extends integrally from the buckle point of the buckle piece 7. After engaging with the locking position 8, it forms a tight-fitting reverse limiting with the inner wall of the locking position 8. The inner side of the hook-shaped structure forms an interlocking contact with the edge of the locking position 8. Even if the slide rail is subjected to outward pulling force, high-frequency vibration or accidental impact, the hook can firmly hold the inner wall of the locking position 8, forming reverse resistance, effectively preventing the locking piece 7 from coming out of the locking position 8, avoiding separation between the inner rail 3 and the outer rail 1, and ensuring the stability of the inner rail 3 locking. When it is necessary to pull the inner rail 3 for telescopic operation, press the rubber sleeve on the end of the handle 4, and the hand force overcomes the elastic driving force of the first torsion spring 6, causing the handle 4 to rotate in the opposite direction around the rivet 5, while squeezing the first torsion spring 6 to cause elastic deformation. During the rotation of the handle 4, the locking piece 7 is simultaneously pulled away from the locking position 8, the hook and the locking position 8 are released, and the inner rail 3 can slide smoothly along the slide groove of the middle rail 2.

[0033] When the inner rail 3 is fully pulled outward along the middle rail 2 to its limit position, the latch 9 installed at the other end of the inner rail 3 loses the compression constraint of the middle rail 2. The second torsion spring 10 releases its elastic driving force, pushing the latch 9 outward. This allows the latch 9 to precisely fit and interlock with the preset limiting plate inside the middle rail 2. The limiting plate forms an axial constraint on the latch 9, restricting the middle rail 2 from sliding outward along the groove of the outer rail 1, thereby preventing the middle rail 2 from coming out of the outer rail 1. This achieves overall stability of the three-section structure of the slide rail (outer rail 1, middle rail 2, inner rail 3). When the slide rail needs to be stored, it can be moved to... The inner rail 3 is pushed inward, and the inner rail 3 drives the locking buckle 9 to move synchronously. The locking buckle 9 and the limiting plate of the middle rail 2 come into contact with each other. The squeezing force overcomes the elastic driving force of the second torsion spring 10, causing the locking buckle 9 to retract inward and squeeze the second torsion spring 10 to undergo elastic deformation until the locking buckle 9 completely disengages from the locking plate. After the limiting constraint is released, the middle rail 2 can be retracted inward along the slide groove of the outer rail 1 along with the inner rail 3 until the slide rail returns to the fully retracted state. At this time, the locking buckle 9 continues to be squeezed by the middle rail 2 and remains in a retracted state, waiting to complete the reset locking when it is pulled out next time.

[0034] The rolling elements installed between the outer rail 1 and the middle rail 2, and between the middle rail 2 and the inner rail 3, form a layered transmission buffer. The rolling element between the outer rail 1 and the middle rail 2 is used to adapt to the overall load-bearing capacity, reduce the sliding friction between the middle rail 2 and the outer rail 1, and ensure the smooth extension and retraction of the middle rail 2. The rolling element between the middle rail 2 and the inner rail 3 serves both lubrication and noise reduction, avoiding direct contact between the metal rails and generating hard friction, while also reducing noise during the sliding process. The plastic buffer plate 11 at the end of the outer rail 1 plays a buffering role when the slide rail is fully retracted and the end of the inner rail 3 contacts the end of the outer rail 1, mitigating the impact force between the two, reducing the noise generated by the collision, and preventing long-term impact from causing rail deformation, loosening of the buckle 7, or wear of the hook corners, thus extending the service life of the overall structure.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sliding rail buckle structure for preventing external detachment, comprising an outer rail (1), a middle rail (2), and an inner rail (3), wherein the inner rail (3) is slidably disposed within the middle rail (2), and the middle rail (2) is slidably disposed within the outer rail (1), characterized in that: A handle switch assembly is installed on the inner rail (3). The handle switch assembly includes a handle (4), a rivet (5) and a first torsion spring (6). The handle (4) is hinged to the inner rail (3) by the rivet (5). The first torsion spring (6) is fitted on the rivet (5) and the two ends of the first torsion spring (6) are respectively connected to the inner rail (3) and the handle (4). The handle (4) is connected to a buckle piece (7), and the bottom end of the outer rail (1) is provided with a locking position (8) that is compatible with the buckle piece (7). The hook at one end of the buckle piece (7) can be locked into the locking position (8) under the action of the first torsion spring (6) to restrict the inner rail (3) from coming out. The other end of the inner rail (3) is provided with a buckle (9) and a second torsion spring (10). The second torsion spring (10) is connected to the buckle (9). The middle rail (2) is provided with a limiting plate. When the inner rail (3) is fully pulled out, the buckle (9) can cooperate with the limiting plate of the middle rail (2) under the action of the second torsion spring (10) to restrict the middle rail (2) from coming off the outer rail (1).

2. The slide rail buckle structure for preventing external detachment according to claim 1, characterized in that: The outer rail (1) is provided with a plastic buffer plate (11) at its end. The plastic buffer plate (11) is used to buffer the impact between the inner rail (3) and the outer rail (1) when the slide rail is stored.

3. The slide rail buckle structure for preventing external detachment according to claim 1, characterized in that: Rolling elements are provided between the outer rail (1) and the middle rail (2), and between the middle rail (2) and the inner rail (3) to reduce friction when the slide rail slides.

4. The slide rail buckle structure for preventing external detachment according to claim 3, characterized in that: The rolling element includes iron sheet ball bearings (12) and plastic sleeve ball bearings (13). The iron sheet ball bearings (12) are disposed between the outer rail (1) and the middle rail (2), and the plastic sleeve ball bearings (13) are disposed between the middle rail (2) and the inner rail (3).

5. The slide rail buckle structure for preventing external detachment according to claim 1, characterized in that: The outer rail (1), middle rail (2) and inner rail (3) are each provided with several hollowed-out grooves (14).

6. The slide rail buckle structure for preventing external detachment according to claim 1, characterized in that: One end of the handle (4) is fitted with a rubber sleeve (15).

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